With this Instructable I am going to show you how to use a SN754410NE Quad H-Bridge IC to control two 12 volt DC Motors.
I have added a video so that you can see the Dual Motor in action. As you can see in the video, all the wires can be a little confusing to look at. To make things easier to view and understand as we go along, I have also created an illustration for you to refer to. You may also download a printable PDF file of this illustration. I have depicted an Arduino board in the illustration, if you already have one you are good to go, if not... you can do like I have and Build Your Own Arduino following another one of my instructables.
Here is the recommended parts you will need in order to complete this project. I have provided sources where you can purchase items from and their prices. These parts are available at others sites as well.